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济南军区联勤部军事交通运输部和中国科学院心理研究所等军内外4家单位,自1988年开始联合对“汽车驾驶员职业适宜性”进行攻关,十几年来,对全军来自29个省、市、自治区的近1万名驾驶员进行了调查,对3 000余名驾驶员进行了职业适宜性测试,积累了大量的数据和资料,并通过研究、分析和实际测试,确定了我军第一部《中华人民共和国军用汽车驾驶员选拔卫生标准》(GJB2262-95)。该标准规定,军队汽车驾驶员职业 相似文献
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Seismic response of underground structure in liquefiable soils was analyzed by means of fully coupled dynamic finite element
method. The soils were simulated by a cyclic mobility constitutive model, which is developed at the base of modified Cam-Clay
model with some concepts such as stress induced anisotropy, over-consolidation and structure. It is verified that the constitutive
model can perfectly described the dynamic character of both liquefiable sand and non-liquefiable clay. Special emphasis was
given for the influence of thickness of liquefiable soil on the seismic response. Results showed that soils at both sides
of the structure flowed toward the bottom of the underground structure with the occurrence of liquefaction, which led to the
uplift of structure. The uplift of underground structure increased with the increasing of thickness of liquefiable soils. 相似文献
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提出了利用电传动内燃机车的电能为铁路平时和战时的抢险、救援等提供应急供电保障的新思路及实现手段,并全面介绍了电传动内燃机车应急供电电源装置这一新型的铁路应急供电保障设备的原理及特点。 相似文献
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提出了防止钢箱梁桥面推移、拥包、开裂的2种技术方案。方案一:利用适用于钢桥面铺装的耐高温、耐老化的环氧结构胶对钢桥面进行防腐、防水处理,同时在环氧结构胶上均匀撒布经过特殊级配设计的玄武岩质碎石,形成粗糙界面,铺装下层为3 cm厚的利用高粘度改性沥青和纤维配制SM A 10,铺装上层为4 cm厚的SM A 13;方案二,在钢桥面板上焊接剪力键,在剪力键上绑扎钢筋网,浇筑5~10 cm的C 50高强高韧性轻质混凝土,再铺装一层4 cm厚的SM A 13。2种技术方法在武汉东西湖互通C匝道桥、武汉香港路立交桥、武汉白沙洲大桥等进行了工程应用,取得了很好的效果。 相似文献